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erik [133]
3 years ago
11

What processes produce the different colors we see in opaque objects?

Physics
1 answer:
Naddika [18.5K]3 years ago
7 0
Answer;
Adsorption and reflection of different wavelengths of light.

Explanation; 
Opaque objects are objects which we can't see through. 
The color of an opaque object is the same as the light that is reflected off it.
The color of an object depends on the waves of visible light that it reflects. When the light hits an object some is absorbed (adsorption) and some reflects, for example, white is white because all the colors are reflected back, plants are green because the chlorophyll reflects the color green, making them appear green to us.


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If a hammer has a resistance arm of 3 inches and the effort arm is 15 inches. What is the mechanical advantage?
Sunny_sXe [5.5K]

Answer:

Option D

MA=5

Explanation:

Mechanical advantage is the  the ratio of the output force to the  input force hence

MA=\frac {Effort arm length}{Load arm length}

Substituting 15 inches for the effort arm length and 3 inches for the load arm length then we obtain the mechanical advantage as

MA=\frac {15}{3}=5

4 0
3 years ago
Josh starts at a position of x=0 meters at the left side of the front of the classroom. Over the course of the class he walks ba
Aneli [31]
Answer:
180 meters

Explanation:
Josh walks 6 meters to the right and the 6 meters back. This means that in one time, Josh walks a total distance of 6+6 = 12 meters
Now, we are given that Josh walks this same distance 15 times.
Therefore, we will multiply this distance by 15 to get the total distance that he walks as follows:
Total distance = 12*15 = 180 meters

Based on the above calculations, Josh walks 180 meters over the course of the class

Hope this helps :)
3 0
4 years ago
How much current is in a circuit that includes a 9.0-volt battery and a bulb with a resistance of 4.0 ohms? A. 0.44 amps B. 36 a
bija089 [108]

Answer:

C. 2.3A

Explanation:

V/Ω=A

9V / 4Ω = 2.25 ≅ 2.3A

8 0
3 years ago
The magnetic field at the earth's surface can vary in response to solar activity. During one intense solar storm, the vertical c
Flauer [41]

Answer:

EMF = 33880 Volts

Explanation:

As per Faraday's law of Electromagnetic induction we know that

Rate of change in magnetic flux will induce EMF in the closed conducting loop

so we have

\phi = B.A

now we have

A = (110 \times 10^3)(110 \times 10^3)

A = 1.21 \times 10^{10}

now we have

\phi = B(1.21 \times 10^{10})

now the induced EMF through this loop is given as

EMF = (\frac{dB}{dt})(1.21 \times 10^{10})

EMF = (2.8 \times 10^{-6})(1.21 \times 10^{10})

EMF = 33880 Volts

5 0
3 years ago
Which is the correct answer?
Nezavi [6.7K]

Answer:

Point A

Explanation:

The work done by stretching or compressing a spring is given by E=1/2kx²

The potential energy is numerically equal to the work done.

This means that the higher the bigger the value of the extension, x, the higher the energy contained.

In this scenario the modulus of x is considered.

Among the given values of x the modulus of -5 is the largest.

thus it gives the highest value of energy.

7 0
4 years ago
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